151k views
0 votes
What is the value of the expression below when x=3
10x²- 7x + 10

2 Answers

5 votes

Answer:

92

Explanation:

The variable 'x' shows up twice in this expression. Replace each instance of 'x' with 3:

10(3)^2 - 7(3) + 10 = 10(9) - 21 + 19 = 92

User Gatteo
by
7.0k points
3 votes

Answer: 79

Concept:

Here, we need to understand the idea of evaluation.

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

Given information

10x² - 7x + 10

x = 3

Substitute the value into the expression

= 10 (3)² - 7 (3) + 10

Simplify by multiplication

= 10 (9) - 21 + 10

= 90 - 21 + 10

Simplify by subtraction

= 69 + 10

Simplify by addition

= 79

Hope this helps!! :)

Please let me know if you have any questions

User Jeremy Wang
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories